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Need help with idle loop, with video
Posted 16 September 2007 - 07:47 PM
The second video is after it is warmed up, still a little loop, but not as bad.
It came up after a rally cross last weekend. It had never done it before.
Any help would be great.
Posted 16 September 2007 - 08:40 PM
Sorry, old/slow computer, dial-up ISP, etc., so I haven't seen your video. However, idle lope (not "loop") can have a few causes, from the simple to the annoying/frustrating. I'd start by checking for loose vacuum hoses, then consider IAC and TPS. Loping can also be a characteristic of too much intake/exhaust valve overlap, so unfortunately a valve sticking is another possibility. (On a DOHC, a jumped belt can be the cause of excessive overlap.)
I have having problems with a looping idle in my 90 legacy. This just started last weekend and I don't even know where to start. The first video[...]It came up after a rally cross last weekend.[...]
Posted 16 September 2007 - 08:51 PM
Posted 16 September 2007 - 09:13 PM
i think i got a IAC around i will see if i can swap it out in the next day or so.
Posted 16 September 2007 - 09:30 PM
Posted 16 September 2007 - 09:40 PM
It's mechanical - so the gauge may have been showing 0, but the engine was probably still going.
What I fing interesting and very much surprising - but cannot make anything of - is seeing the tach needle fall to zero without the engine stopping.
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